Revised allocateID and generateID function

[xinluz6]

Fixes #6471

Changes proposed in this pull request:

• This pull request updates the allocateID() and generateID() method to use higher-order random numbers

• By shifting the current timestamp 20 bits left, it adds a random number up to 1 million (2^20) to the lower bits.

[wetneb]

Hi @xinluz6, apologies that we haven't reviewed this yet. To me it's not clear that the change proposed in #6471 is really a good move, so I have voiced that there.

In general, for your first PR it's worth going for an issue which states a problem / feature request that is already agreed on: you can do that by avoiding the issues labeled with "Status: Pending Review".

[xinluz6]

Hi, thank you for your comment, I appreciate your guidance and will take it into consideration for future contributions. Thanks again for your review.